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Tytuł:
Thorium nuclear fuel - thoron aspect
Autorzy:
Zagórski, Z. P.
Głuszewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/148763.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
CR-39
nuclear fuel
radon-220
radon-222
thorium fuel
thoron
Opis:
The communication reports a serious complication connected with preparation, storage and transportation of fuel for thorium and uranium/thorium nuclear reactors. Whereas uranium fuel of any degree of enrichment is free from radium, which produces radon-222, thorium itself produces thoron (radon-220). Measurement of thoron by a routine ionization-chamber device around a small sample of 2 g thorium dioxide shows already the health endangerment situation. The presence of thoron is also confirmed by a typical solid state dosemeter (polymer CR-39), exposed to the air around ThO2 and etched afterwards with warm NaOH solution. The unavoidable presence of thoron can cause increase of price of production of nuclear fuel, demanding special approach to the method of manufacture.
Źródło:
Nukleonika; 2010, 55, 3; 407-408
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon 222Rn in drinking water of West Pomeranian Voivodeship and Kuyavian-Pomeranian Voivodeship, Poland
Autorzy:
Wieprzowski, K.
Bekas, M.
Waśniewska, E.
Wardziński, A.
Magiera, A.
Powiązania:
https://bibliotekanauki.pl/articles/146558.pdf
Data publikacji:
2018
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
drinking water
ionizing radiation
Kuyavian-Pomeranian Voivodeship
preliminary monitoring of radioactivity
radon-222 concentration
West Pomeranian Voivodeship
woda pitna
promieniowanie jonizujące
województwo kujawsko-pomorskie
wstępne monitorowanie radioaktywności
stężenie radonu-222
województwo zachodniopomorskie
Opis:
Radon Rn-222 is a commonly occurring natural radionuclide found in the environment from uranium- -radium radioactive series, which is the decay product of radium Ra-226. The presence of radon carries negative health effects. It is, in fact, classifi ed as a carcinogen, and therefore, it is necessary to continuously monitor its concentration. The aim of this study was to determine the level of radon-222 concentration in water intended for human consumption in the two voivodeships of Poland: West Pomeranian and Kuyavian-Pomeranian. Measurements were performed for more than 60 intakes. The level of radon was measured by using the liquid scintillation counting method. The range of measured radon concentration in the water from the West Pomeranian Voivodeship was from 0.90 to 11.41 Bq/dm3 with an average of 5.01 Bq/dm3, while that from the Kuyavian-Pomeranian Voivodeship was from 1.22 to 24.20 Bq/dm3 with an average of 4.67 Bq/dm3. Only in three water intakes, the concentration of radon-222 exceeded the value of 10 Bq/dm3. The obtained results allowed to conclude that population exposure associated with radon-222 in water is negligible and there is no need to take further action. In the case of three intakes where a higher concentration of radon was found, the potential exposure was low.
Źródło:
Nukleonika; 2018, 63, 2; 43-46
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The characteristics of radon and thoron concentration from soil gas in Shenzhen City of Southern China
Autorzy:
Wang, N.
Zheng, L.
Chu, X.
Li, S.
Yan, S.
Powiązania:
https://bibliotekanauki.pl/articles/148789.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
222Rn/220Rn
soil gas
radon mapping
China
Opis:
Radon (222Rn) and thoron (220Rn) from soil gas are very significant factors that can affect the indoor radon level in the first floor or in the basement. China is one of the countries with the highest thorium content in the world. Therefore, it is very significant to study 222Rn/220Rn concentration in the soil in Shenzhen City (SC). A 222Rn/220Rn survey was performed using a portable radon monitor (model RAD7) at 69 sites, covered a total area of 1800 km2 in 2013 to get the original data for radon risk estimation in SC. The average values of 222Rn and 220Rn concentration of soil gas of the total 69 locations are 86 ± 72 kBq•m–3 and 118 ± 85 kBq•m–3, respectively. 222Rn/220Rn concentrations are related to geological lithology. 222Rn concentrations vary from 40 to 370 kBq•m–3 and from 15 to 118 kBq•m–3 in weathered granite products and sediments, respectively, while 220Rn concentrations are from 103 to 435 kBq•m–3 and 2.2 to 96 kBq•m–3. The higher 220Rn values were mainly observed at the sites covered by the weathered granite products. Comparing with the areas of high 222Rn concentration, the areas of high 220Rn values are larger. The distribution of 222Rn concentration in the vertical direction displays an exponential distribution mode, but there is no rule of 220Rn concentration. The investigation suggests that people should pay attention to 220Rn contribution in the radon mapping of SC, as well as in the indoor radon survey.
Źródło:
Nukleonika; 2016, 61, 3; 315-319
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon on the ground floor in the buildings of pre-university education in Montenegro
Autorzy:
Vukotic, Perko
Zekic, Ranko
Andjelic, Tomislav
Svrkota, Nikola
Djurovic, Andrija
Dlabac, Aleksandar
Powiązania:
https://bibliotekanauki.pl/articles/148189.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ground-floor rooms
pre-university institutions
Radon-222
univariate and multivariate analysis
Opis:
A national radon survey was performed recently in all buildings of pre-university education in Montenegro. During the school year 2016/2017, radon (222Rn) was measured with passive detectors (Radosys, RSFV type) in 2855 ground-floor rooms of 468 buildings. The average 9-month radon activity concentrations above the level of 300 Bq/m3 were found in 728 rooms, which belong to 213 buildings, while in 111 rooms, belonging to 47 buildings, they were above 1000 Bq/m3 . Radon concentrations in the educational buildings, averaged over all sampled ground-floor rooms in a building, range from 16 Bq/m3 to 2810 Bq/m3 , with arithmetic mean (AM) = 275 Bq/m3 . They follow a log-normal distribution with geometric mean (GM) = 174 Bq/m3 and geometric standard deviation (GSD) = 2.58. There are 135 buildings with average indoor radon concentrations on the ground floor above 300 Bq/m3 and 18 buildings where they are above 1000 Bq/m3 . The influence of the nine factors (climate, urban/rural area, age of building, number of stories, building materials, basement, foundation slab, window frames, and heating) on radon concentrations in the buildings was analysed by univariate (UVA) and multivariate (MVA) methods. The univariate analysis revealed the significant relationship of the four factors: age of buildings, basement, building materials, and window frames with radon concentrations on the ground floor in the buildings, while multivariate analysis added to those factors urban/rural area and number of stories, but excluded building materials as a factor infl uencing signifi cantly radon concentrations.
Źródło:
Nukleonika; 2020, 65, 2; 53-58
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zbiornika retencyjno-dozującego oraz zwałowiska skały płonnej Kopalni Węgla Kamiennego Brzeszcze na poziom dawki od radonu 222Rn otrzymywanej przez okolicznych mieszkańców
Impact of the retention pond and gangue repository of Brzeszcze coal mine on the level of dose received from radon 222Rn by the local inhabitants
Autorzy:
Śleziak, M.
Duliński, M.
Powiązania:
https://bibliotekanauki.pl/articles/167171.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Górnictwa
Tematy:
zbiorniki retencyjne
zagrożenie radiacyjne
dawka promieniowania jonizującego
radon 222Rn
retention pond
radiation hazard
ionizing radiation dose
Opis:
W ciągu 35 lat użytkowania zbiornika retencyjno-dozującego „Brzeszcze” zgromadzono w jego osadach znaczne ilości substancji promieniotwórczych, głównie radu. Celem stwierdzenia wpływu obecności radonu – produktu rozpadu radu na poziom zagrożenia radiacyjnego dla ludności zamieszkałej w sąsiedztwie, wykonano szereg pomiarów stężenia radonu 222Rn (aktywności właściwej) w powietrzu wokół zbiornika i nad odkrytymi osadami dennymi. Pomiary te wykonano przenośnym monitorem radonowym PYLON AB – 5. Ponadto, w części zachodniej miasta wykonano analizy stężenia radonu przy wykorzystaniu stacjonarnego stanowiska pomiarowego, sprzężonego z aparaturą pozwalającą na rejestrację podstawowych parametrów meteorologicznych. Obserwowane stężenia radonu 222Rn w powiązaniu z podstawowymi parametrami meteorologicznymi pozwalają na stwierdzenie, że radon z okolic zbiornika jest przenoszony wraz z wiatrem nad zamieszkałe tereny miasta. Prezentowane wyniki badań mają na celu pokazanie rejestrowanych poziomów stężeń radonu oraz wynikających z jego obecności przyczynków do dawki promieniowania otrzymywanej przez okolicznych mieszkańców.
During the 35 years of exploitation of the Brzeszcze retention pond a significant amount of radioactive elements, mainly radium 226Ra, accumulated in its bottom sediments. A series of both field and laboratory measurements were performed to determine the influence of radon 222Rn emanation (which is the daughter of radium 226Ra) on the level of radiation hazard which inhabitants in the vicinity of the pond may be exposed to. Measurements were carried out in the atmospheric air and over the sediments by the PYLON AB-5 monitor. Additionally, in the western part of Brzeszcze city, the activity concentration of radon 222Rn in the atmosphere was measured using a stationary installation. It was coupled with apparatus registering basic meteorological parameters. Investigations have shown that radon from the pond and adjacent gangue repository is transported by wind above the inhabited area of the city. Based on field and stationary measurements the contribution from 222Rn to the radiation dose received by local residents has been determined.
Źródło:
Przegląd Górniczy; 2018, 74, 11; 51-61
0033-216X
Pojawia się w:
Przegląd Górniczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dose assessment and radioactivity of the mineral water resources of Dimeh springs in the Chaharmahal and Bakhtiari Province, Iran
Autorzy:
Shahbazi-Gahrouei, D.
Saeb, M.
Powiązania:
https://bibliotekanauki.pl/articles/146762.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radium-226
radon-222
radioactivity
effective dose
Dimeh springs
Chaharmahal and Bakhtiari
Opis:
. One of the main sources of public exposure from natural radioactivity is radium and radon and its short lived decay products. The aim of this study is focused on determining the concentration of mentioned radionuclides in the mineral water resources in one of the highest altitude regions (Zagros Mountains), the Chaharmahal and Bakhtiari province, in South-West Iran, namely the Dimeh springs. Eighty drinking spring water samples were taken from the Dimeh springs (ten samples for each spring) to determine radium-226 (226Ra) and radon-222 (222Rn) concentrations using the emanation method and a liquid scintillation counting method, respectively. The results of this study showed that the effective dose from the consumption of drinking water of Dimeh springs (6.4 žSv/y) is not comparable to the other annual effective dose such as inhalation of radon and its products in cosmic and terrestrial rays published by one of the authors previously. Also, the annual effective dose measured here is much lower than the worldwide mean value 0.45 mSv reported by USCEAR, 2000 and is also low enough and below the proposed limits in other countries and this is the reason why this sources of water may be considered as safe drinking water in the region.
Źródło:
Nukleonika; 2008, 53, 1; 31-34
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiary radonowe w wybranych budynkach mieszkalnych ziemi rybnickiej
Radon measurements in selected buildings residential buildings in the Rybnik Region
Autorzy:
Rubin, Jan Antoni
Wyciszczok, Daniel
Doleżych, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/27323734.pdf
Data publikacji:
2023
Wydawca:
STE GROUP
Tematy:
promieniotwórczość naturalna
rad
Ra-226
radon Rn-222
geologia
natural radioactivity
radium
geology
Opis:
W artykule przedstawiono wyniki badań poziomu stężenia radonu w wybranych budynkach mieszkalnych zlokalizowanych na terenie ziemi rybnickiej. Do pomiarów, prowadzonych w kilku kampaniach w latach 2005-2010 stosowano pasywną metodę pomiarów, z wykorzystaniem detektorów śladowych cząstek alfa. Wykonano 122 pomiary w piwnicach i na parterach w 61 budynkach. Czas ekspozycji detektorów wynosił od 3 do 6 miesięcy. Zakres mierzonych stężeń radonu wynosił od 10 do 390 Bq/m³ na parterach oraz od 28 do 740 Bq/m³ w piwnicach. Średnie arytmetyczne mierzonych wartości wynosiły odpowiednio: 74 Bq/m³ na parterach oraz 128 Bq/m³ w piwnicach i były wyższe od wartości średnich obliczonych dla całej Polski, jak i dla Górnośląskiego Zagłębia Węglowego (GZW).
This paper presents the results of studies on the level of radon concentration in selected residential buildings located in the area of the Rybnik region. A passive measurement method, using alpha particle trace detectors, was applied for measurements carried out in several campaigns between 2005-2010. A total of 122 measurements were carried out in the basements and ground floors of 61 buildings. The exposure time of the detectors ranged from 3 to 6 months. The range of measured radon concentrations was from 10 to 390 Bq/m³ on the ground floors and from 28 to 740 Bq/m³ in the basements. The arithmetic means of the measured values were respectively: 74 Bq/m³ on the ground floors and 128 Bq/m³ in the basements and were higher than the average values calculated for Poland as a whole, as well as for the Upper Silesian Coal Basin (GZW).
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2023, 12, 1; 95--108
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Szybkość uwalniania się 222Rn z wód podziemnych do atmosfery
222Rn release rate from groundwater to the atmosphere
Autorzy:
Przylibski, Tadeusz A.
Maciejewski, Piotr
Zagożdżon, Katarzyna D.
Zagożdżon, Paweł P.
Powiązania:
https://bibliotekanauki.pl/articles/20197025.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Radon
222 Rn
wody gruntowe
woda radonowa
powierzchnia wody
stężenie aktywności 222 Rn
jednostka metamorficzna Śnieżnika
groundwater
radon water
surface water
222 Rn exhalation rate
Śnieżnik metamorphic unit
Opis:
The authors conducted studies on the release rate of 222Rn from groundwater flowing out of a spring, from metamorphic reservoir rocks. This source gives rise to a stream about 205 m long. The activity concentration of Rn in the spring was about 700 Bq/dm33, took place at a distance of about 1 70-180 metres from the spring. With regard to the waterflow path, flowtime and the volume of water flowing through the cross-section of the tested stream, the exhalation coefficient of 222Rn from water to atmospheric air is 3.80 Bq/dm3/m, 1.51 Bq/dm3/s and 1. 25 Bq/dm3/dm3, respctively. According to the authors, further research conducted in other springs occurring in other types of rocks and under different flow conditions (at different times of the year) will allow characterizing the dynamics of the process of 222Rn release from groundwater through surface waters into the atmosphere. Perhaps this process can be described with a universal mathematical function.
Źródło:
Przegląd Geologiczny; 2022, 70, 10; 742-750
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potencjalnie lecznicze wody radonowe Masywu Ślęży
Potentially therapeutic radon waters of Ślęża Massif
Autorzy:
Przylibski, T. A.
Fijałkowska, L.
Bielecka, A.
Powiązania:
https://bibliotekanauki.pl/articles/2074598.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
radon
222Rn
wody podziemne
wody radonowe
groundwater
radon water
medicinal water
potential therapeutic water
Opis:
The authors have conducted research on radon occurrence in the groundwater system of Ślęża Massif in the Fore-Sudetic block. The research included documenting occurrence of radon waters in the granitoids of Strzegom-Sobótka Massif, buildingNWandWslopes of Ślęża. Among several springs flowing out from the granitoids and their waste, the Klasztorne Spring is characterized by constant radon (222Rn) concentration (306 ±39 Bq/dm3), but also constant though small discharge during the year, which enables estimating the admissible volume of this spring at 0.3 m3/h. The results obtained during the research show that this water can be treated as potentially medicinal. It generates the opportunity for the nearby town of Sobótka to develop as a health resort. Confirming the presence of radon groundwater in the granitoid part of Ślęża Massif implies a great probability that such w occur in the whole area of the Strzegom-Sobótka intrusion. It opens possibilities of recognizing new resources of potential therapeutic water and entails the necessity to take suitable actions for radiological protection of people living in this area.
Źródło:
Przegląd Geologiczny; 2008, 56, 8/2; 763-771
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potencjalnie lecznicze wody radonowe wschodniej części Wysokiego Grzbietu Gór Izerskich (Sudety) o największej zawartości radonu w Polsce
Potentially medicinal radon waters of the eastern part of the High Ridge in the Izera Range (Sudetes), containing the greatest radon concentration in Poland
Autorzy:
Prusak, Jakub
Przylibski, Tadeusz A.
Powiązania:
https://bibliotekanauki.pl/articles/20222176.pdf
Data publikacji:
2023
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
222 Rn
radon
wody gruntowe
woda radonowa
woda lecznicza
Sudety
Szklarska Poręba
groundwater
radon water
medicinal water
Sudetes
Opis:
In the years 2020-2022, the authors conducted research on the activity concentration of 222 Rn in the groundwater of the eastern part of the Izera metamorphic unit. As a result, they found potentially medicinal radon waters in hornfelses of the eastern part of the Szklarska Poręba band. The value measured in one of the water samples appeared to be the highest activity concentration of 222Rn in groundwater of Poland so far - 3368 ±61 Bq/dm3. The authors also found that outflows of potentially medicinal radon waters account for almost 85.5% (47 out of 55) of all groundwater outflows in the study area. Thanks to the large amount of data obtained, the authors calculated a new value of the hydrogeochemical back-ground of 222 Rn in the groundwater of the Izera metamorphic unit. The background is currently 17-890 Bq/dm3. In Poland, higher values have only been reported of the Lądek-Śnieżnik metamorphic unit. The research results also open the way to the possible creation of a modern radon spa in Szklarska Poręba. It could operate in Biała Dolina on the basis of both previously found resources of radon waters of the Karkonosze granite and the radon waters forming within the eastern part of the Izera metamorphic unit.
Źródło:
Przegląd Geologiczny; 2023, 71, 2; 58-70
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon-based technique for the analysis of atmospheric stability : a case study from Central Poland
Autorzy:
Podstawczyńska, A.
Chambers, S. D.
Powiązania:
https://bibliotekanauki.pl/articles/146556.pdf
Data publikacji:
2018
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radon-222
Central Poland
stability classification
stable nocturnal boundary layer
atmospheric mixing state
Polska centralna
klasyfikacja stabilności
Opis:
An economical and easy-to-implement technique is outlined by which the mean nocturnal atmospheric mixing state (“stability”) can be assessed over a broad (city-scale) heterogeneous region solely based on near- -surface (2 m above ground level [a.g.l.]) observations of the passive tracer radon-222. The results presented here are mainly based on summer data of hourly meteorological and radon observations near Łodź, Central Poland, from 4 years (2008–2011). Behaviour of the near-surface wind speed and vertical temperature gradient (the primary controls of the nocturnal atmospheric mixing state), as well as the urban heat island intensity, are investigated within each of the four radon-based nocturnal stability categories derived for this study (least stable, weakly stable, moderately stable, and stable). On average, the most (least) stable nights were characterized by vertical temperature gradient of 1.1 (0.5)⁰C·m-1, wind speed of ~0.4 (~1.0) m·s-1, and urban heat island intensity of 4.5 (0.5)⁰C. For sites more than 20 km inland from the coast, where soils are not completely saturated or frozen, radon-based nocturnal stability classification can significantly enhance and simplify a range of environmental research applications (e.g. urban climate studies, urban pollution studies, regulatory dispersion modelling, and evaluating the performance of regional climate and pollution models).
Źródło:
Nukleonika; 2018, 63, 2; 47-54
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seasonal and diurnal variation of outdoor radon (222Rn) concentrations in urban and rural area with reference to meteorological conditions
Autorzy:
Podstawczyńska, A.
Kozak, K.
Pawlak, W.
Mazur, J.
Powiązania:
https://bibliotekanauki.pl/articles/148896.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
outdoor radon (222Rn) concentration
urban climate
seasonal variation
diurnal variation
meteorological parameters
Opis:
The objective of the study was to investigate temporal variability of outdoor radon (222Rn) concentration registered in the center of Łódź (urban station), at Ciosny (rural station) and Kraków (suburban station) in relation to meteorological parameters (i.e. air temperature, temperature vertical gradient, wind speed, soil heat flux, volumetric water content in soil) with special consideration of urban-rural differences. Continuous measurements of 222Rn concentration (at 60 min intervals) were performed at a height of 2 m above the ground using AlphaGUARDŽ PQ2000PRO (ionization chamber) from January 2008 to May 2009. 222Rn levels were characterized by a diurnal cycle with an early morning maximum and a minimum in the afternoon. The well-marked 24 h pattern of radon concentration occurred in summer at anticyclonic weather with cloudless sky, light wind and large diurnal temperature ranges. The urban measurement site was characterized by the lowest atmospheric 222Rn concentration and an urban-rural differences of radon levels increased from winter to summer and during the nighttime periods. The maximum contrasts of 222Rn levels between Łódź and Ciosny, reaching – 30 Bqźm–3, were registered in June and July during the urban heat island (UHI) phenomenon (a positive thermal anomaly of a city if compared to rural area) and strong thermal inversion near the ground in the rural area.
Źródło:
Nukleonika; 2010, 55, 4; 543-547
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność stężenia radomu (Rn-222) w przygruntowej warstwie powietrza na tle wartości strumienia ciepła glebowego
Variability of radom (Rn-222) concentration in the near-ground air layer with reference to soil heat flux value
Autorzy:
Podstawczyńska, A.
Powiązania:
https://bibliotekanauki.pl/articles/338263.pdf
Data publikacji:
2012
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
centrum Łodzi
stacja zamiejska Ciosny
stężenie radonu (Rn-222) w powietrzu
strumień ciepła glebowego
exponential function
radon (Rn-222) concentration in the air
rural station Ciosny
soil heat flux
city center of Łódź
Opis:
Celem opracowania jest znalezienie związku między stężeniem radonu (ρRn-222), rejestrowanym w powietrzu 2 m nad gruntem, i strumieniem ciepła glebowego (QG). Pomiary ρRn-222 wykonywano co 1 godz. za pomocą automatycznej komory jonizacyjnej Alpha GUARDR PQ2000 Pro. Synchronicznie do stężenia radonu w latach 2008-2010 mierzono QG za pomocą czujnika typu HFP01 Heat Flux Plate firmy Cambell Scientific Ltd. w centrum Łodzi oraz na stacji zamiejskiej Ciosny (teren rolniczy, 25 km na połnoc od Łodzi). Badane zmienne cechuje quasi-synchroniczny przebieg dobowy z maksimum w godzinach nocnych i minimum w godzinach popołudniowych. Związek ρRn-222 i QG opisano modelem funkcji eksponencjalnej. Na stacji Ciosny miesiące od III do XI cechują się bardzo wysokim stopniem dopasowania danych modelowanych do danych pomiarowych stężenia radonu w świetle indeksu zgodności Willmotta. Dla stacji w Łodzi uzyskano gorsze rezultaty, stosując model ρRn-222 w którym wykorzystuje się strumień ciepła glebowego.
The aim of the study was to find the relationship between radon (Rn-222) concentration and soil heat flux. Atmospheric concentration of radon was measured continuously (in 60-min intervals) at a height of 2 m above the ground using AlphaGUARD® PQ2000PRO (ionization chamber) at urban (city center of Łódź) and rural (Ciosny, 25 km north of Łódź) site in the period 2008-2010. Simultaneously, soil heat flux (QG) was measured by means of HFP01 Heat Flux Plate, Campbell Scientific Ltd. The diurnal pattern of Rn-222 concentration was revealed with a maximum in the early morning and a minimum in the afternoon. In general, the diurnal variation of near-surface Rn-222 concentration varied approximately in phase with the soil heat flux. The exponential function model was used to estimate a daily course of radon concentration on the basis of soil heat flux values in particular months. The period from March to November was characterised by a good agreement between the observed and model-predicted Rn-222 concentration ("index of agreement" by Willmott was used to evaluate the model). Measured Rn-222 concentrations in the rural station Ciosny fitted better to model data than those from the urban station in the city center of Łódź.
Źródło:
Woda-Środowisko-Obszary Wiejskie; 2012, 12, 2; 197-206
1642-8145
Pojawia się w:
Woda-Środowisko-Obszary Wiejskie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exhalation rate of radon-222 from concrete and cement mortar
Autorzy:
Perna, Allan Felipe Nunes
Paschuk, Sergei Anatolyevich
Corrêa, Janine Nicolosi
Narloch, Danielle Cristine
Barreto, Rafael Carvalho
Del Claro, Flávia
Denyak, Valeriy
Powiązania:
https://bibliotekanauki.pl/articles/147305.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cement mortar
concrete
exhalation rate
radon-222
Opis:
The main sources of radon in the air of dwellings are soil, building materials, and groundwater. This study aimed to determine the exhalation rate of 222Rn from samples made of concrete and cement mortars, as well as to evaluate by means of gamma spectrometry the hazard indexes associated with other radionuclides present in the studied samples of building materials. The results obtained allowed the comparison of the exhalation rate of radon using theoretical calculations based on one-dimensional and three-dimensional models. Measurements of the activity concentration of radon in air was performed by AlphaGuard radon detector. Furthermore, obtained results were compared with the measurements performed inside the concrete test cells. These test cells were built with the aim of simulating a dwelling in small dimensions and to evaluate indoor radon activity associated with concrete. Consequently, the obtained results of radon exhalation rate, in becquerel per meter squared per hour, for the concrete was 2.55 ± 0.03 Bq•h–1•m–2 for the 1D model and 0.461 ± 0.008 Bq•h–1•m–2 for the 3D model. The exhalation rate of radon, for the cement mortar was 1.58 ± 0.03 Bq•h–1•m–2 for the 1D model and 0.439 ± 0.011 Bq•h–1•m–2 for the 3D model. The indoor concentration of 222Rn from the test cell was 112 ± 9 Bq/m3 . These values were below the limit of 300 Bq/m3 recommended by the International Commission on Radiological Protection (ICRP) and <148 Bq/m3 , the limit recommended by the US Environmental Protection Agency (US EPA). Even so, these values should be the subject of concern since that activity is related only to the contribution of concrete walls.
Źródło:
Nukleonika; 2020, 65, 3; 65-72
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intercomparison of radon CR-39 detector systems conducted in CLORs calibration chamber
Autorzy:
Mamont-Cieśla, K.
Stawarz, O.
Karpińska, M.
Kapała, J.
Kozak, K.
Grządziel, D.
Chałupnik, S.
Chmielewska, I.
Olszewski, J.
Przylibski, T. A.
Żebrowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/148842.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radon-222
CR-39 track detector
intercomparison
RadoSys
Opis:
Six radon laboratories, which perform indoor radon measurements to jointly investigate temporal variations of radon concentration in houses in a couple of regions in Poland, participated in the intercomparison exercise. There are involved three commercially available Hungarian RadoSys systems and four own laboratory methods. All of them are based on the etched-track CR-39 detectors. The intercomparison was conducted in a calibration laboratory of the Central Laboratory for Radiological Protection (CLOR), Warsaw, Poland, accredited by the Polish Center for Accreditation (previously AP 101, at present AP 057). Comparison measurements were performed during three expositions in the CLOR’s radon calibration chamber under controlled normal climatic conditions and steady radon concentration. The results were referred to the value of the radon concentration determined by AlphaGUARD monitor traceable to the primary 222Rn standard in Physikalisch-Technische Bundesanstalt (PTB), Braunchweig, Germany. The mean performance ratio defined as a ratio of the reference to participant’s result range from 0.88 to 1.31.
Źródło:
Nukleonika; 2010, 55, 4; 589-593
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 16

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